Support DevTools for off-main-thread-fetch

third_party/WebKit/LayoutTests/TestExpectations

 # This is the main failure suppression file for Blink LayoutTests.
 # Further documentation:
 # https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
 
 # Intentional failures to test the layout test system.
 Bug(intentional) harness-tests/crash.html [ Crash ]
 Bug(intentional) harness-tests/timeout.html [ Timeout ]
 
 # TODO(qyearsley): Remove these lines and uncomment other test expectation
 # lines related to CSS tests (crbug.com/706118).
@@ skipping 1923 matching lines @@
 # Temporary, until we stop use_system_harfbuzz on Linux including non-official builds
 crbug.com/462689 [ Linux ] fast/text/unicode-variation-selector.html [ Failure ]
 
 # Disabled briefly until test runner support lands.
 crbug.com/479533 accessibility/show-context-menu.html [ Skip ]
 crbug.com/479533 accessibility/show-context-menu-shadowdom.html [ Skip ]
 crbug.com/483653 accessibility/scroll-containers.html [ Skip ]
 
 crbug.com/491764 http/tests/inspector/service-workers/user-agent-override.html [ Pass Timeout ]
 crbug.com/491764 virtual/mojo-loading/http/tests/inspector/service-workers/user-agent-override.html [ Pass Timeout ]
+crbug.com/491764 virtual/off-main-thread-fetch/http/tests/inspector/service-workers/user-agent-override.html [ Pass Timeout ]
 
 # Fails with leak detector.
 crbug.com/622915 [ Linux ] ietestcenter/css3/grid/grid-column-003.htm [ Skip ]
 
 # Temporarily disabled after chromium change
 crbug.com/492511 [ Mac ] fast/text/atsui-negative-spacing-features.html [ Failure ]
 crbug.com/492511 [ Mac ] fast/text/international/arabic-justify.html [ Failure ]
 
 # Ref tests that fail due to differences in inline box structure, even though they contain the same text.
 # This happens because inline box layout uses fixed-point measurements, which can cause rounding differences.
@@ skipping 918 matching lines @@
 crbug.com/701047 [ Mac10.12 ] editing/style/block-style-002.html [ Failure ]
 crbug.com/701047 [ Mac10.12 ] editing/style/block-style-003.html [ Failure ]
 crbug.com/701047 [ Mac10.12 ] editing/style/block-styles-007.html [ Failure ]
 
 # mojo-loading: This is an experimental feature. failing virtual tests are
 # listed below.
 
 crbug.com/664873 http/tests/xmlhttprequest/small-chunks-response-text.html [ Failure Pass ]
 crbug.com/664873 virtual/mojo-loading/http/tests/xmlhttprequest/small-chunks-response-text.html [ Failure Pass ]
 
-# off-main-thread-fetch: This is an experimental feature.
-crbug.com/443374 virtual/off-main-thread-fetch/http/tests/inspector/service-workers/user-agent-override.html [ Failure ]
-
 crbug.com/660295 inspector/elements/elements-panel-restore-selection-when-node-comes-later.html [ Pass Failure ]
 
 # [css-grid]
 crbug.com/659610 fast/css-grid-layout/grid-baseline.html [ Failure ]
 crbug.com/659610 fast/css-grid-layout/grid-baseline-margins.html [ Failure ]
 crbug.com/511177 external/wpt/css/css-grid-1/grid-layout-properties.html [ Failure ]
 crbug.com/707359 [ Mac ] fast/css-grid-layout/grid-align-baseline-vertical.html [ Failure ]
 crbug.com/707359 [ Mac ] fast/css-grid-layout/grid-self-baseline-03.html [ Failure ]
 crbug.com/707359 [ Mac ] fast/css-grid-layout/grid-self-baseline-04.html [ Failure ]
 crbug.com/707359 [ Mac ] fast/css-grid-layout/grid-self-baseline-06.html [ Failure ]
@@ skipping 328 matching lines @@
 crbug.com/718155 payments/payment-request-in-iframe.html [ Failure ]
 crbug.com/718155 payments/payment-request-in-iframe-nested-not-allowed.html [ Failure ]
 
 # Layout Tests on Swarming (Windows) - https://crbug.com/717347
 crbug.com/724392 [ Win ] fast/css/font-family-case-insensitive.html [ Failure Pass Timeout ]
 
 # Sheriff failures 2017-05-17
 # Crashes
 crbug.com/723841 http/tests/dom/script-module-load-incomplete-no-crash.html [ Skip ]
 crbug.com/723841 virtual/mojo-loading/http/tests/dom/script-module-load-incomplete-no-crash.html [ Skip ]